Objective: To study the progress of vesicoureteric reflux (VUR) grade III or IV in children followed up prospectively over 10 years.
Study Design: One hundred forty-nine children (33 boys and 116 girls) with VUR were recruited for the International Reflux Study in Children and were treated with a medical regimen and monitored by means of serial cystograms. VUR disappearance was based on negative findings on 2 consecutive cystograms.
Results: At 5 years, VUR with dilatation was seen in 72 (48%) children and VUR without dilatation, in 55 (37%); 22 (15%) children had no reflux. At 10 years, VUR with dilatation was seen in 34 (23%) children and VUR without dilatation, in 37 (25%); 78 (52%) children had no reflux. Grade IV VUR persisted in 8 children. Absence of VUR was significantly associated with grade III versus grade IV VUR (P = .007), unilateral versus bilateral reflux (P = .0002), and age > or = 5 years at entry versus age < 5 years (P = .001). Neither sex nor renal scarring at entry individually affected resolution of VUR. Among 43 (29%) children with intermittent VUR, only 6 had reflux with dilatation at 10 years.
Conclusion: Continuing reduction in the severity of VUR in children receiving careful medical treatment was observed over 10 years. On the basis of negative findings on 2 consecutive cystograms, VUR was absent in half of the children.
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